Improvement in key-fasteners



W. NERACHER. KEY-FASTENER.

Patented. July 18. 1876.

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. WILLIAM NERAOHER, OF CLEVELAND, OHIO.

IMPROVEMENT IN KEV-FASTENERS.

Specification forming part of Letters Patent No. 179,943, dated July 18, 1876; application filed June 22, 1876.

To all whom it may concern.-

Be it known that I, WILLIAM NERAOHER, of Cleveland, in the county of Ouyahoga and State of Ohio, have invented a certain new and Improved Key-Fastener; and I do hereby declare that the following is a full, clear, and complete description thereof, reference being bad to the accompanying drawings, making a part of the same.

Figure l is an edge view of a door having thereto applied the key-fastener. Fig. 2 is a side view of Fig. 1. Fig. 3 is a detached section.

Like letters of reference refer to like parts in the several views.

This invention is a device for securing a key in a door-lock, so that said key may not be turned in the same and pushed therefrom from the outsidefor the purpose of picking the lock to gain entrance into the room.

For a full and correct. understanding of the construction and operation of the device, reference will be had to the following detailed description In the drawing, A represents a section of a door, of which E is the lock, 0 the knobs, and D the key, all of which are or may be like such in ordinary use. E is a case secured to the inside of the door, directly under the knob, as will be seen in the drawings. In said case is fitted a sliding bolt, F, Fig. 3, around the upper end of which is coiled a spring, fir, between the collar a and the end of the case. The spring is retained in place by said collar and a pin, b. In the bolt is secured the stem of a finger-piece, H, Fig. 1. The stem passes into the case through a slot, wherein it slides for actuating the bolt F. On one side of the shank of the key is formed a projection, I, at

as shown in Fig. 2.

a right angle to the bow thereof, as will be seen in Fig. 1. In the edge of the lug is cut a notch corresponding in size to the end of the bolt, and into which said end fits, as will be seen in Fig. 2.

The practical operation of the above-described key-fastener is as follows: The door being locked, and the key left therein and turned so as to bring the projection of the same upward and under the end of the bolt, the point of the bolt will slip into the notch (referred to) by the reaction of the spring Gr,

It will be obvious that in consequence of the engagement of the end of the bolt-in the notch of the projection, the key cannot be turned in the lock, neither on the inside of the door nor upon the outside; hence the lock cannot be picked so long as the key remains therein.

In order to remove or turn the key, the bolt must be pushed up out of the notch. This is, done by the finger-piece H, which, when the bolt is lifted from out of the notch, is then pushed laterally into the notch e, Fig. 1, thereby retaining'the bolt up out of the notch, so that the key may now be turned in the lock or withdrawn therefrom.

What I claim as my invention, and desire to secure by Letters Patent, is-- The case E, slide or bolt F, spring G, and finger-piece H, in combination with the key D, notched lug I, and door A, substantially in the manner as described, and for the purpose specified.

WILLIAM NERAGHER. 

